Ag/MnO2 Composite Sheath-Core Structured Yarn Supercapacitors

Ji Hwan Kim, Changsoon Choi, Jae Myeong Lee, Mônica Jung de Andrade, Ray H. Baughman, Seon Jeong Kim

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

One-dimensional (1D) yarn or fiber-based supercapacitors that have small diameter, volume and high mechanical strength are needed due to the demands on power source for wearable electronics, micro-devices, and implantable medical devices. The composite sheath is fabricated on a commercially available CNT yarn substrate by alternating depositions of MnO2 and Ag layers. Synergistic effect of high loading level of pseudocapacitive MnO2 and reasonably improved rate-capability are achieved. In the composite sheath, the interconnected networks provide electrical contact between MnO2 aggregates and adjacent Ag layer. The conductive Ag inter layers shorten the solid-state charge diffusion length in the MnO2. Moreover, generated electrons during the charge/discharge process can be collected rapidly by the adjacent Ag layer, therefore, the great extents of MnO2 could be loaded onto the surface of CNT core fiber electrode without a significant rate-capability degradation. Due to the high MnO2 loading level, the composite sheath-core yarn supercapacitor showed excellent specific areal capacitance (322.2 mF/cm2) and according energy density (18.3 µWh/cm2).

Original languageEnglish
Article number13309
JournalScientific reports
Volume8
Issue number1
DOIs
StatePublished - 2018 Dec 1

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Yarn
Composite materials
Fibers
Strength of materials
Capacitance
Degradation
Electrodes
Electrons
Substrates
Supercapacitor
Wearable technology

Cite this

Kim, J. H., Choi, C., Lee, J. M., de Andrade, M. J., Baughman, R. H., & Kim, S. J. (2018). Ag/MnO2 Composite Sheath-Core Structured Yarn Supercapacitors. Scientific reports, 8(1), [13309]. https://doi.org/10.1038/s41598-018-31611-2
Kim, Ji Hwan ; Choi, Changsoon ; Lee, Jae Myeong ; de Andrade, Mônica Jung ; Baughman, Ray H. ; Kim, Seon Jeong. / Ag/MnO2 Composite Sheath-Core Structured Yarn Supercapacitors. In: Scientific reports. 2018 ; Vol. 8, No. 1.
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abstract = "One-dimensional (1D) yarn or fiber-based supercapacitors that have small diameter, volume and high mechanical strength are needed due to the demands on power source for wearable electronics, micro-devices, and implantable medical devices. The composite sheath is fabricated on a commercially available CNT yarn substrate by alternating depositions of MnO2 and Ag layers. Synergistic effect of high loading level of pseudocapacitive MnO2 and reasonably improved rate-capability are achieved. In the composite sheath, the interconnected networks provide electrical contact between MnO2 aggregates and adjacent Ag layer. The conductive Ag inter layers shorten the solid-state charge diffusion length in the MnO2. Moreover, generated electrons during the charge/discharge process can be collected rapidly by the adjacent Ag layer, therefore, the great extents of MnO2 could be loaded onto the surface of CNT core fiber electrode without a significant rate-capability degradation. Due to the high MnO2 loading level, the composite sheath-core yarn supercapacitor showed excellent specific areal capacitance (322.2 mF/cm2) and according energy density (18.3 µWh/cm2).",
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Kim, JH, Choi, C, Lee, JM, de Andrade, MJ, Baughman, RH & Kim, SJ 2018, 'Ag/MnO2 Composite Sheath-Core Structured Yarn Supercapacitors', Scientific reports, vol. 8, no. 1, 13309. https://doi.org/10.1038/s41598-018-31611-2

Ag/MnO2 Composite Sheath-Core Structured Yarn Supercapacitors. / Kim, Ji Hwan; Choi, Changsoon; Lee, Jae Myeong; de Andrade, Mônica Jung; Baughman, Ray H.; Kim, Seon Jeong.

In: Scientific reports, Vol. 8, No. 1, 13309, 01.12.2018.

Research output: Contribution to journalArticle

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AU - Lee, Jae Myeong

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AU - Baughman, Ray H.

AU - Kim, Seon Jeong

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